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    <meta charset="UTF-8">
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    <title>Document</title>
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    <script>
        // 求1-100的偶数
        let sum=0;
        let i=1;
        while (i<=100) {
            if(i%2===0){
                sum+=i;
            }
            i++;
        }
        console.log(sum);
    </script>
</body>
</html>